1890.] Botany. 371 
Sub-tribe IV. Rottbeelliez Benth. 
Genus 16. Vossia Wall. India and Africa, 
‘¢ 17. Urelytrum Hack, Africa. 2 sp. 
‘¢ 18. Rhytachne Desv. Tropical Africa. 4 sp. 
“ 19. Rotthellia Linn fil. Both Hemispheres. 1 sp. 
s 20. Manisuris Sw. Both Hemispheres. 1 sp. 
‘¢ 21. Opheurus Gertn. Eastern Hemisphere. 4 sp. 
‘¢ 22. Ratzeburgia Kunth. Burmah. 1 sp. 
Sub-tribe V. Euandropogonez Benth. 
Genus 23. Trachypogon Nees. America, Africa, and Madagascar. 1 sp. 
‘¢ 24. Elionurus Humb. Tropical and Sub-tropical. 15 sp. 
‘¢ 25. Arthraxon Beauv. Eastern Hemisphere. 8 sp. 
‘¢ 26. Andropogon Linn. Both Hemispheres. 193 sp. 
‘¢ 27. Cletstachne Beuth. ‘Tropical Africa. 1 sp. 
‘¢ 28. Themeda Forsk. Eastern Hemisphere. 8 sp. 
“« 29. Jseilema Anderss. India and Australia. 5 sp. 
«¢ 30. Germainia Bal. & Poit. India and China. 1 sp. 
Some of the species are wonderfully complex ; for example, Andro- 
fogon sorghum Brot., which contains two sub-species, halepensis and 
sativus ; the former with five varieties and seven sub-varieties ; while 
the latter has thirty-seven varieties and twelve sub-vdrieties. 
CHARLES E. BEssEY. 
Sachs’ History of Botany.!—The many readers of the NATUR- 
ALIST who are familiar with the German edition of Sachs’ History 
of Botany, which appeared in 1875, will be glad to see the work 
in an English dress. It will at once become much better known to 
botanical students, for with all our German teaching in the colleges, it 
is still a fact that books in the English language are read and consulted 
much more freely by students than when in German. The translation 
has been so well done in this case that American students may safely 
take it up in place of the original, expecially as the author has in this 
made some minor changes. 
The work is divided into three ‘‘ books,” the first of which is de- 
voted to the ‘‘ History of Morphology and Classification,” the second 
1 History of Botany Sy ite by Julius von Sachs, Professor of Botany in the Uni- 
versity of Wiirtzburg. thorized translation by Henry E. F. Garnsey, M.A., Fellow, 
of Magdalen College, baeri Revised by Isaac Bayley Balfour, M.A., M.D., F.R.S., 
Botany in the University, and Keeper of the Royal Botanic Garden, Edin- 
burg. Oxford : at the Clarendon Press. 1890. Crown 8vo, pp. xvi., 568. 
